\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Effect of MPD on the logarithm of market-level prices}
\begin{tabular}{l*{4}{c}}
\toprule
                    &\multicolumn{1}{c}{(1)E5 \textit{Average}}&\multicolumn{1}{c}{(2)E5 \textit{Minimum}}&\multicolumn{1}{c}{(3)Diesel \textit{Average}}&\multicolumn{1}{c}{(4)Diesel \textit{Minimum}}\\
\midrule
treated             &     -0.0299\sym{***}&     -0.0237\sym{***}&     -0.0235\sym{***}&     -0.0179\sym{***}\\
                    &    (0.0001)         &    (0.0001)         &    (0.0001)         &    (0.0001)         \\
\midrule
Observations        &     5281266         &     5281266         &     5369616         &     5369616         \\
Adjusted \(R^{2}\)  &       0.855         &       0.810         &       0.806         &       0.784         \\
\bottomrule
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize SEs are clustered at the fuel station level.}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
\end{table}
